Total-reflection lens

ABSTRACT

This invention is regarding to an innovatively designed lens that employs two holes of different shapes as light-inlet and light-outlet surfaces to direct lights. The main feature is that the light can emit out at a more focused and uniformed fashion through refraction and total reflection. On the other hands, the lens also has grooves set to allow for side lighting purposes when needed. And with the grooves, the light can emit at a wide range when multiple such lens are properly assembled.

BACKGROUND OF THE INVENTION

This invention is regarding to an innovatively designed lens that canutilize the light from light source efficiently, enlarge lighting range,and enhance lighting brightness and uniformity.

In the prior art as Taiwan Patent M275418 “Lens with capability ofuniforming lights”, it comprises light-inlet and light-outlet surfaces,and they are on both sides of the lens respectively. The light-inletsurface is convex, and there are multiple smalllight-uniformity-enhancing lens on the light-outlet surface. The lightfirst refracts through the light-inlet surface, and then emit out withuniform brightness and hue through the multiplelight-uniformity-enhancing lens. The aforementioned is a solid lenswhose both surfaces have different curveness so for light to refract tohave both focusing and scattering effects to have uniform brightness andhue.

However, the lens is a solid one, and it would hinder the heat-spread,and cause problem when cooperating with lights (even if it ispower-saving LED) for a long period of time, which would seriouslyimpact the life of the light source.

BRIEF SUMMARY OF THE INVENTION

This invention is to offer a total-reflection lens that can effectivelyfocus lights from a light source (LED) to greatly enhance the lightingefficiency, brightness and uniformity. To reach aforementioned purpose,the proposed total-reflection lens is a transparent cone-shaped bodywhose diameter gets wider from its bottom towards top. Further, axiallyit has a cylinder hole at bottom, and a cone-shaped hole (diameter getswider towards its top surface.) on top. Accordingly, when a light sourceis placed in the cylinder hole, the light can be focused well throughthe total-reflection lens, reaching the purposes of enhancing lightingefficiency, heat spread and the life of light. Moreover, one or multiplegrooves can be facilitated on top of the lens at its cone-shaped hole sofor the light source to emit side lights, which enables wider lightingangle and higher lighting efficiency when multiple lens assemblytogether.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1—a perspective view of the I” preferred embodiment

FIG. 2—a sectional view of the I” preferred embodiment

FIG. 3—a sectional view of the 1^(st) preferred embodiment with extendedillustration

FIG. 4—a perspective view of the 1^(st) preferred embodiment in aposition of use.

FIG. 5—a perspective view of the 2^(nd) preferred embodiment

FIG. 6—a sectional view of the 2^(nd) preferred embodiment

FIG. 7—a perspective view of the 3^(rd) preferred embodiment

FIG. 8—a sectional view of the 3^(rd) preferred embodiment

FIG. 9—a perspective view of the 4^(th) preferred embodiment

FIG. 10—a sectional view of the 4^(th) preferred embodiment

FIG. 11—a perspective view of the 5^(th) preferred embodiment

FIG. 12—a sectional view of the 4^(th) preferred embodiment

FIG. 13—a perspective view of the 6^(th) preferred embodiment

FIG. 14—a sectional view of the 6^(th) preferred embodiment

FIG. 15—a perspective view of the 7^(th) preferred embodiment

FIG. 16—a sectional view of the 7^(th) preferred embodiment

FIG. 17—a perspective view of the 8^(th) preferred embodiment

FIG. 18—a sectional view of the 8^(th) preferred embodiment

FIG. 19—a perspective view of the 9^(th) preferred embodiment

FIG. 20—a sectional view of the 9^(th) preferred embodiment

DETAILED DESCRIPTION OF THE INVENTION

Below is a detailed description of a preferred embodiment. First, withreference to FIGS. 1-3, the proposed total-reflection lens is atransparent cone-shaped body 10 with diameter getting wider from itsbottom towards top. Further, axially the transparent cone-shaped body 10has a cylinder hole 11 at bottom, and a cone-shaped hole 12 (diametergets wider towards its top surface.) on top with the cylinder hole 11and cone-shaped hole 12 connecting to each other. The cylinder hole 11serves as the inlet surface for light source, while the cone-shaped hole12 as the outlet surface for light source. The aforementioned are themain features of this invention accordingly. The best angle between thecylinder hole 11 and the cone-shaped hole 12 is around 130 degrees. Onthe other hand, the surface of cone-shaped hole 12 can be also concaved(ex: replaced with a bowl-shaped hole 14 as shown in FIGS. 2-1) orconvex.

When a light source 20 (could be LED) is placed in the cylinder hole 11,the central light can emit out through the cylinder hole 11 and thecone-shaped hole 12 directly, while the side light first gets refractedthrough surface of the cylinder hole 11, secondly totally reflected bythe outer surface of the cone-shaped body 13, and then emit out throughthe surface of the cone-shaped hole 12. Accordingly, it reaches thepurposes of enhancing lighting utilization efficiency and uniformity.

Further for equivalent technical extensions of the preferred embodiment,as shown as FIGS. 4-11, there can be symmetrical grooves 121 lyingacross between surface of the cone-shaped hole 12 and outer surface ofthe cone-shaped body 10, so as for the light source 20 to partially emitout through for side lighting purpose. About the grooves 121, they canbe

shaped (as shown in FIGS. 4 and 5), and they can be as deep as to reachthe cylinder hole 11 (as shown in FIGS. 6 and 7). Moreover, the grooves121 can be also U-shaped (as shown in FIGS. 8 and 9), and they can be asdeep as to reach the cylinder hole 11 (as shown in FIGS. 10 and 11).

Furthermore, as shown in FIGS. 12-15, multiple grooves 121 can befacilitated equally-spaced. The Figures just exemplify 4 grooves, butany number of grooves should be covered and protected in the scope ofclaims of this invention. On the other hand, as shown in FIGS. 16-19,the grooves 121 can be cylinder-shaped concaves and symmetricallyfacilitated so as to enhance the variety of lighting ranges andpatterns.

With all aforementioned, the invention deserves grant of a patent basedon its capability of industrial application and absolute novelty. Theexample illustrated above is just an exemplary embodiment for theinvention, and shall not be utilized to confine the scope of the patent.Any equivalent modifications within the scope of claims of the patentshall be covered in the protection for this patent.

1. A total-reflection lens that is a transparent cone-shaped body whosediameter gets wider from its bottom towards top, wherein the saidcone-shaped body axially has a cylinder hole at bottom, and acone-shaped hole on top so as to enhance lighting efficiency.
 2. Thetotal-reflection lens of claim 1, wherein the said cone-shaped hole hasat least one groove.
 3. The total-reflection lens of claim 2, whereinthe said grove is

shaped.
 4. The total-reflection lens of claim 2, wherein the said groveis U-shaped.
 5. The total-reflection lens of claim 2, wherein the saidgrove is cylinder-shaped concave.
 6. The total-reflection lens of claim2, wherein the said grove could be as deep as to reach the cylinderhole.
 7. The total-reflection lens of claim 1, wherein the saidcone-shaped hole can be replaced with bowl-shaped hole.
 8. Atotal-reflection lens that is a transparent cone-shaped body whosediameter gets wider from its bottom towards top, wherein the saidcone-shaped body axially has a cylinder hole at bottom, a cone-shapedhole on top to enhance lighting efficiency and uniformity, and at leastone groove to allow side lighting through it.
 9. The total-reflectionlens of claim 8, wherein the said grove is

shaped.
 10. The total-reflection lens of claim 8, wherein the said groveis U-shaped.
 11. The total-reflection lens of claim 8, wherein the saidgrove could be as deep as to reach the cylinder hole.
 12. Thetotal-reflection lens of claim 8, wherein the said cone-shaped hole canbe replaced with bowl-shaped hole.
 13. The total-reflection lens ofclaim 8, wherein the surface of the said cone-shaped hole can be convexsurfaced.
 14. The total-reflection lens that is a transparentcone-shaped body with main feature of having a cylinder hole axially.15. The total-reflection lens of claim 14, there is at least one grooveon top of the said cylinder hole.